虛擬套件：mail-transport-agent
This is a virtual package. See the Debian policy for a definition of virtual packages.
負責填實 mail-transport-agent 的套件
- exim4-daemon-heavy
- Exim MTA (v4) daemon with extended features, including exiscan-acl
- exim4-daemon-light
- lightweight Exim MTA (v4) daemon
- msmtp-mta
- light SMTP client with support for server profiles - the regular MTA
- opensmtpd
- secure, reliable, lean, and easy-to configure SMTP server